calculation help

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Hi - I know zero about editing my website. And I need a couple things on my website.

A calculation feature to dedtermine cost by size. Example: a decal 36x24 inches cost $25.00.
36+24 inches = 60 times .40 cents (round up to nearest whole dollar amt)

Help :O) ?

 
braincramp replied on at Permalink Reply
braincramp
This is pretty simple math that php could do, I believe there is a block that can add php in the marketplace. You can probably find some code out there that could do the calculations as well. If you are looking to do something with the results other than display them it gets a bit harrier.